Light control apparatus



Dec. 1.8, 1934. w. K. KEARASLEY 'Y 1,985,097

LIGHT CONTROL vAPPARATUS Filed Dec. l, 1935 Invent OP z William K Keqvsie His Atioimeg.

cord 4l. The cord il terminates in a box 42. The contacter 36 is mounted in box 42. in the wall of this box sockets 43 are mounted and lamps 37 are .connected thereto throughcords 44 and plug caps 45.

The connections within the box 42 are diagrammatically shown in Fig. 3. The cord 4l. cornprises two conductors 46 and 47 which are connected to one terminal of the sockets on the 'two sides of the box respectively. The second contacts oi the receptacles on the left-hand side oi the box 42 are connected to .each `other through a conductor 48, and the second contacts ci the recepta' cle on the other side of the box are connected to each other through the conductor 49. The operating coil 56 of switch 36 is connected by conductors 5l and-52 tothe terminals of a receptacle 53 and by conductors 54 and 55-to a receptacle 56. The receptacle 56 contains four contacts 57, 56, 59 and 66 which are connected to conductors 55, 54, 46 and 47 respectively.

The contacter 36 is provided with two arms 6l and 62. when the contacter is in the open position the arm 61 engages a contact 63 and thereby connects conductor '48 to conductor 49.` The circuit may betraoed from conductor 48 to conductor 64,l contact 63, switch' arm 61, conductor 65 to conductor 49.- With this connection, a lamp connected to one side of the box is in series with a. lamp connected to the other side oi the box. With I Y this arrangement, it is of course possible to obtain an unbalanced lighting eiect by connecting one lamp to one side o! the boxand two or more lamps'to the otherside. Ii an equal number or.

' lamps are connected to the two sides of the box however and the lamps are substantially oi 'the `verly distributed and as many boxes 42l as are needed are connected in multiple. When the proper poses are obtained the operator presses the same resistance, the illumination obtained from the lamps will be equally distributed. The circuit for this series connection may be traced from the source 38 to conductor 46 through a lamp on the lett side of the box, conductors 48 and 64, contact 63, switch arm 6l to conductors 65 and49, to a lamp on the right side of the box, back to conductor 47 and to the source 38.

After'the switch 16 is properly mounted on the antinous release, it is connected to the box 42 by a socket 28 which engages the contacts 17, a

two-conductor cord -66 attached to .the socket 28, and by means of a plug cap 67 to the receptacle 56. This plug cap contains tour contacts 68,\69,

70, and ceptacle 71 which respectively engage the recontacts ,57, 58, 59 and 66. When the coil'50 is closed and the switch arma 61 and62 are moved into engagement with the contacts 72 and 73 respectively. A,Whenthese switch contacts are thus engaged, al1 the lamps are connected 4directly across the source. The circuits 'may betraced from conductor 46 to conductor 74, contact 72, switch arm 61, conductors and 49. As above stated, the contacts o! the receptacles on the righthand sigle of the box are'connected respectively to conductors 47 and-49. Conductor 47 is directly connected to the source 38 and the conductor 49, being connected to the conductor 46 on the other side of the source, all the lamps connected to receptacles on the right-hand side of thebox are therefore connected directly to the source. The switch arm 62 closes a circuit from conductor 47, one side oi the source 38, through conductor 75, contact 73 and conductor 76, to conductor 48. On the left-hand of the receptacles are connected respectively to conductors46and48. Whentheswitcharm pressed in, a circuit to the operating side of the box 42 the contacts` 11,656,699? rent is obtained by a plug 46 and a two-conductor closess. circuit between conductors 46 and di?, therefore, the lamps on the left-hand side of the lbox are connected to the source Vin multiple with each other. Condensers 77 and 73 are respectively connected across the switch arms 61 and 62 and their respective contacts 72 and 73 for the purpose of reduoingarcing at the contacts.`

For the purpose vof using several of the boxes 42 and controlling-,them irom one switch 16, the box 42 is provided with a receptacle 53, the contacts of which areI connected to the operating coil 50. It is, therefore, necessary only to connect receptacle 53 ci one box to the corresponding receptacle on a second box for operating the coils in multiple by one switch i6. Such connection is shown in Fig. 4 where a box 42' is co1` nected to a source ci current just as box 42 is .connected and a cord 60 provided with suitable plug caps at itsgrespective ends connects the contacter cciis in multiple. Any desired number ci such boxes may thus be connected in multiple.

The switch i6 having its contacts i7 engaged by s. socket 26 controls the coil 50 through the corci- 66 having conductors 62 and 63 connected respectively to contacts 684 and 7l or plug 67.-

The plugl 67 is further provided with contacts 69 and 70, which are'connected to each other. When the pluwg 67 is placed into the socket 56 and the respe the switch 16 is in position to close the contacter coil circuit. This circuit may be traced from con# ductor 47, contacts 60 and 71, conductor 63, switch 16, conductor 82, contacts 68 and 57, conductors 55 and 52, coil 50, conductors 51 and 54, contacts 56, 69, 70 and 59 to conductor 46.

In operation the switch 1 6 is attached to the antinous release of a camera, the lights are propter is opened. Further pressure on the push button moves the switch-and the antinous release to open the camera shutter. The light thusobtained is suilicient to take snapshots or very, short exposures and the subjects have no time to alter their respective poses before the picture:

is actually taken.

What I claim as new and desire to secure by Letters Patentlpi the United States is:

l. In a photographic light control apparatus,

a control switch comprising a push button, a hous-` ing therefor,l a pair o! contacts which are connected to each other when said push button is pressed into said housing, and a clamp for atl taching -said control switch tothe headv of a camera release mechanism comprising a screwattached to said housing and axially aligned with saidy push button, a clamping member for encontact members; arranged to project outside oi -said housing for engagement vby a socket and by said contact disk when said push button is pressed into said housing, and a clamp tor sective contacts are in engagexrientV -gaging said head mounted upon s'aid screw, and 'means i'or securing said head between said screw curing said switch to a camera release mechanism;E *15 button and attached to said housing, and a ciamping member rotatably mounted upon said screw and provided with a centering slot opposite the end of said screw for receiving the head oi.' a camera release mechanism whereby the turning ofsaid member on said screw centers the release head andclamps it in axial alignment with said push button. y

3. A light control switch for use with photographic apparatus including a housing provided with a pair oi contacts, a push button for completing` a lcircuit through said contacts normally biased away from said contacts, clamping means 1,985,097 .including a screw axially aligned with said .p

for clamping said housing to a camera release button comprising a screw attached to said housing in axial alignment with said push button and an elliptical clamping member provided with a threaded hole on one of its long sides arranged for receiving the said screw and provided with a slot having V-shaped sides arranged opposite to the said threaded hole whereby the clamp may receive and center any sized camera release button and clamp said button in axial alignment with said bush button between the end of said screw and said clamp.

WILLIAM K. KEliRSiLlEIY.` 

